This polyline stationing LISP file from Raymond Rizkallah contains three related functions for use in AutoCAD. They all operate on entities such as a polyline, line, arc, and spline. Load the LISP file and let’s look at the three functions, all of which prompt you to pick the entity and choose a text height. The ST1 function places multiple blocks along the entity at the specified interval distance, similar to how the Measure command works. The function ST2 places a single block on the entity at a distance you specify from the start point. The last function, ST3, places a single block on the entity at a point specified by you. The block used by these functions is defined in the LISP routine and includes the distance specified and the direction of the entity.